The NYPD has dropped sex crime charges against a Manhattan bartender busted for one of the Park Slope grope attacks, law enforcement sources told The Post.

Joshua Flecha, 32, of Queens was cleared after the victim of a May 7 attack changed her story to say she wasn’t sure the hapless suspect she’d picked out of a lineup was her assailant – and told cops she would no longer cooperate in the probe.

“I’m not sure any more, don’t call me again,” she told cops, the sources said Flecha was busted Monday after the 37-year-old victim of the subway station attack picked him out of a lineup following his arrest early Monday.

But sources said today that Flecha has since been cleared of the crime and is only charged with marijuana possession.

Police believed Flecha – a bartender at Heartland Brewery in Midtown – might have been the groper wanted in five similar subway attacks in the area, but all of those victims failed to pick him from lineups.

Flecha,was busted Monday standing near several parked cars while he watched a porn clip on his cell phone. Cops said his pants were also unzipped at the time.

Police first spotted Flecha at 2:30 a.m. on Greenwood Avenue near East 4th Street.

About 45 minutes later, at 3:15 a.m., the same anti-crime team observed Flecha on 17th Street, between 10th and 11th avenues, in Windsor Terrace walking along a line of parked cars, police said.

Suspecting that Flecha might be trying to break into one of the parked cars, the cops got out of their car, approached Fletcha and ordered him to put his hands on one of the parked cars.

He was found to be in possession of marijuana and a bottle of Jack Daniels, cops said.